[Geschlossen] Translated page cannot be edited in content builder

Background of the issue:
I am trying to edit a translated page with the content editor, but the window is blank. In the classic editor, I can see the page, but the text is not translated. I followed the recommendations on this page: https://wpml.org/documentation/translating-your-contents/using-different-translation-editors-for-different-pages/. The issue can be seen here: versteckter Link. I expect to see the same page when translated and be able to edit it with the WordPress content editor. It worked before. I want to add new pages in English and then translate and modify the layout in other languages. Original page in English: versteckter Link.

Symptoms:
The translated page cannot be edited in the content builder; the window is blank. In the classic editor, the text is not translated.

Questions:
Why is the translated page blank in the content editor?
Why is the text not translated in the classic editor?